Structural shape.



PATENTED NOV, 13, 1906.

LR. TANNER. STRUCTURAL SHAPE.

APPLICATION FILED SEPT. 24, 1904.

INVENTOR a rZH.Ta,n27/6f H mm WITNESSES:

ATTORNEY in: cm, wasnlucmmwid.

UNITED STATES PATENT onrron.

STRUCTURAL SHAPE.

Specification of Letters Patent.

Patented Nov. 13, 1906.

Application filed September 24,1904. Serial No. 225.763.

To all whom, it may concern.-

Be itknown that I, JULiUs R. TANNER, a citizen of the United States, residing at Pitts burg, in the county of Allegheny and State of Pennsylvania, have invented or discovered new and useful Ii'nprovements in Structural Shapes, of which the following is a specification.

My invention relates to structural shapessuch as columns, girders, and the likeand the methods of making the same.

It is the object to produce structural shapes from elements which require little or no machine-worksuch as sawing, slotting, milling, or punc'hingand at the same time distribute the metal so as to withstand the strains to which it may be subjected. I make my shapes out of a plurality of faces joined to a central or connector portion preferably by rolled or swaged joints.

In the accompanying drawings, forming a part hereof, Figure 1 is a crosssection of one form of my invention; Fig. 2, a perspective of the same, and Fig. 3 an offset cross-section, showing how the Z-bars are held to the connector-bar.

Referring to the drawings, 1 designates the central connector-bar or channel-iron whose cross-section is H-shaped. The channels 2 and 3 are rolled or otherwise formed in the bar 1 with the side walls thereof preferably parallel, as shown in the channel 3.

I provide four Z-bars 4, 5, 6, and 7, each with the edge of one flange thickened or shouldered to form the shoulders or ribs 8 on the side turned toward the adjacent reentrant angle. I assemble the Z-bars in pairs with the thickened edges in the channels 2 and 3. The thickened edges are placed with their plane surfaces back to back, the shoul ders or ribs 8 lying against the outer edges of the channels, which are somewhat deeper than the depth of the ribs. Those portions of the H-bars which project beyond the ribs or shoulders 8 are rolled or otherwise swaged down over the ribs and adjacent portions of i the Z-bars, whereby the latter are securely 1 j held in place. The edges of each palr of Z 1 bars within the channehbar are seen to form j a head, which is securely held in the channels I by the bending of the ends of the H-bar down I over the thinner portions 9 of the pair of 2- j' bars. The pressing of the metal of the bar 1 g against the sides of the ribs and the edges of l the Z-bars against the bottom of the chanlnels also assists in holding them securely. j The Z-bars may have the grooves 10 or be otherwise roughened to give the structure greater strength; but they may be smooth if 1 preferred. l The drawings show only one of the forms which my invention may take, and I desire protection on all modifications of the same which employ the principles thereof.

In my invention I provide a distribution of a large part of the metal at a maximum distance from the center of the structure or shapes.

Having described my invention, I claim 1. In a structural shape, the combination of a channeled member, and a plurality of headed and flanged members, swaged in each channel thereof.

2. In a structural shape, a channeled member, a headed member, the channel being swaged to embrace the head, and interlocking means on the contiguous surfaces of said members.

3. In a structural shape, a channeled member, a headed member, the channel embracing the head, and interlocking means on the contiguous surfaces of said members.

j Signed. Pittsburg this 21st day of Sepj tember, A. D. 190

JULIUS R. TANNER. Witnesses:

\ F. N. BARBER, l A. M. STEEN. 

